Why would much of the gases condense (collect into liquid/"fog") in the outer part of the solar system, far from the heat of the sun?

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.

i think its 100.

hope this !